DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #83
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #83: Real Exam Question with Answer & Explanation
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Question
Which of the following pairs of arguments cannot be used in DataFrame.join() to perform an inner join on two DataFrames, named and aliased with "a" and "b" respectively, to specify two key columns column1 and column2?
Options
- AjoinExprs = col("a.column1") === col("b.column1") and col("a.column2") === col("b.column2")
- BusingColumns = Seq(col("column1"), col("column2"))
- CAll of these options can be used to perform an inner join with two key columns.
- DjoinExprs = storesDF("column1") === employeesDF("column1") and storesDF("column2") ===
- EusingColumns = Seq("column1", "column2")
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